Combine first 9 ingredients; stir well.
Place fillets in a shallow dish; spread green onion mixture evenly over fillets.
Cover and marinate in refrigerator 30 minutes.
Line a steaming basket with a plate at least 1 inch smaller in diameter than the basket.
Transfer fillets to plate, using a slotted spoon; discard marinade.
Place steaming basket over boiling water.
Cover and steam 10 minutes or until fish flakes easily when tested with a fork